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Steel Engraved/Intaglio Process
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When the artwork for a stamp is created and approved, experienced engravers employed by
the printers of bank notes and other currency accurately transfer the original artist's design
on to a soft steel sheet, called a die, using special engraving tools. In the case of the Jacques
Cartier stamp, the artwork was sent to French engraver Claude Haley (1923-1988). Originally, a large number of designs were created using the same dimensions as the
stamp, but today the artwork is usually five times larger than the stamp. The dimensions of
the engraved "mirror image" are often greatly reduced compared with the original artwork,
and this reduction work requires patience and skill on the engraver's part, because the design
must be transferred accurately from one medium to another. |
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Progressive proofs are made on thick paper at different stages in the process to ensure that
the engraving is satisfactory. These proofs are also sent to the competent authority issuing the stamp for the purposes of comments, approval and preservation. The
approval of the die proofs allows the printer to move on to creating the transfer roll (or
transfer cylinder) and the printing base. |
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When the die bearing the image of the stamp has been officially approved and has hardened, it is pressed by a small soft steel roll (transfer cylinder) under the high pressure exerted by the transfer press: the design is taken up on the roll, as a relief transfer. |
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The image thus obtained is the exact reverse of the one engraved on the die. |
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Once again, the roll is hardened and then used to create the metal printing plate which will carry many images of the stamp, and the stamps are printed using this plate. |
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Each of the stamp images on the printing plate must be the exact copy of the one on the original die. When the specialized engravers who make the plate are satisfied with it, it is hardened and is then ready to be used for the printing process. This phase of stamp production is termed siderography. |
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Just as in the preparation of the die, progressive proofs are made at various stages of the printing to establish if there is a need to modify any part of the printing base. When this is approved, the complete, final printing plates are prepared in the stamp issue colour. The printer or the organization issuing the stamp usually keeps these plate proofs in its permanent files. These documents authorize the printer to print the official stamp. The partial plate proof of the Jacques Cartier stamp, created by the Imprimerie des timbres-poste de France, is special, with 23 different colour trials for a group of 50 stamps. The final colours appear on the stamp in the lower right corner. |
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Steel Engraved/Intaglio Process
Engraver Claude Haley hard at work on the die for the Jacques Cartier stamp.
National Archives of Canada, Post Office Department fonds, Acc. 1989-565.P87.7023
| Description of the Item | |
| Description of the Fonds |
Steel Engraved/Intaglio Process
Die proof, where the absence of the 32 cents denomination should be noted.
National Archives of Canada, Post Office Department fonds, Acc. 1989-565.001011-015
| Description of the Item | |
| Description of the Fonds |
Steel Engraved/Intaglio Process
Finished die for the Jacques Cartier stamp.
National Archives of Canada, Post Office Department fonds, Acc. 1989-565.P87.7026.3
| Description of the Item | |
| Description of the Fonds |
Steel Engraved/Intaglio Process
The die is placed under the transfer press.
National Archives of Canada, Post Office Department fonds, Acc. 1989-565.P87.7026.1
| Description of the Item | |
| Description of the Fonds |
Steel Engraved/Intaglio Process
The die design is taken up on the transfer cylinder (transfer roll) using the transfer press.
National Archives of Canada, Post Office Department fonds, Acc. 1989-565.P87.7025
| Description of the Item | |
| Description of the Fonds |
Steel Engraved/Intaglio Process
In contrast to the die, the design on the transfer cylinder is the right way round and in relief.
National Archives of Canada, Post Office Department fonds, Acc. 1989-565.P87.7024
| Description of the Item | |
| Description of the Fonds |
Steel Engraved/Intaglio Process
The transfer cylinder reproduces the design as often as required on the roll or the printing plate.
National Archives of Canada, Post Office Department fonds, Acc. 1989-565.P87.7027
| Description of the Item | |
| Description of the Fonds |
Steel Engraved/Intaglio Process
The printing plate or roll shows the design in intaglio and in reverse.
National Archives of Canada, Post Office Department fonds, Acc. 1989-565.P87.7028
| Description of the Item | |
| Description of the Fonds |
Steel Engraved/Intaglio Process
Partial plate proof combining 23 different colour trials.
National Archives of Canada, Post Office Department fonds, Acc. 1989-565.001011-014
| Description of the Item | |
| Description of the Fonds |